using System;
using System.Collections.Generic;
using iTextSharp.text;
using iTextSharp.text.pdf;
/*
 * $Id:  $
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 1998-2014 iText Group NV
 * BVBA Authors: Bruno Lowagie, et al.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by
 * the Free Software Foundation with the addition of the following permission
 * added to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED
 * WORK IN WHICH THE COPYRIGHT IS OWNED BY ITEXT GROUP, ITEXT GROUP DISCLAIMS THE WARRANTY
 * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 * details. You should have received a copy of the GNU Affero General Public
 * License along with this program; if not, see http://www.gnu.org/licenses or
 * write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License, a
 * covered work must retain the producer line in every PDF that is created or
 * manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing a
 * commercial license. Buying such a license is mandatory as soon as you develop
 * commercial activities involving the iText software without disclosing the
 * source code of your own applications. These activities include: offering paid
 * services to customers as an ASP, serving PDFs on the fly in a web
 * application, shipping iText with a closed source product.
 *
 * For more information, please contact iText Software Corp. at this address:
 * sales@itextpdf.com
 */
namespace iTextSharp.tool.xml {

/**
 *
 */

    public class XMLWorkerFontProvider : FontFactoryImp
    {
        public const String DONTLOOKFORFONTS = "\ufffc";

        protected Dictionary<String, String> fontSubstitutionMap = new Dictionary<String, String>();

        public XMLWorkerFontProvider():this(null, null){}

        public XMLWorkerFontProvider(String fontsPath) : this(fontsPath, null){}

        public XMLWorkerFontProvider(String fontsPath, Dictionary<String, String> fontSubstitutionMap)
        {
            if (string.IsNullOrEmpty(fontsPath)) {
                base.RegisterDirectories();
            } else if (!fontsPath.Equals(DONTLOOKFORFONTS)) {
                base.RegisterDirectory(fontsPath, true);
            }

            if (fontSubstitutionMap != null) {
                this.fontSubstitutionMap = fontSubstitutionMap;
            }
        }

        virtual public void AddFontSubstitute(String font, String substitute) {
            fontSubstitutionMap[font] = substitute;
        }

        public override Font GetFont(String fontname, String encoding, bool embedded, float size, int style,
                                     BaseColor color)
        {
            Font font = GetFont(fontname, encoding, size, style);
            if (color != null) {
                font.SetColor(color.R, color.G, color.B);
            }
            return font;
        }

        public override Font GetFont(String fontname, String encoding, float size, int style)
        {
            if (fontname == null)
            {
                return new Font(Font.FontFamily.UNDEFINED, size, style);
            }

            Font unicodeFont = GetUnicodeFont(fontname, encoding, size, style);
            return unicodeFont;
        }

        private Font GetUnicodeFont(String fontName, String encoding, float size, int style)
        {
            Font font = null;
            try
            {
                BaseFont baseFont = null;
                font = base.GetFont(fontName, BaseFont.IDENTITY_H, BaseFont.EMBEDDED, size, style, null);

                if (font != null)
                {
                    baseFont = font.BaseFont;
                }

                if (baseFont == null)
                {
                    String substFontName = fontSubstitutionMap[fontName];
                    if (!string.IsNullOrEmpty(substFontName))
                    {
                        font = base.GetFont(substFontName, BaseFont.IDENTITY_H, BaseFont.EMBEDDED, size, style, null);
                    }
                }
            } catch {
                BaseFont baseFont = null;
                font = base.GetFont(fontName, encoding, BaseFont.EMBEDDED, size, style, null);

                if (font != null)
                {
                    baseFont = font.BaseFont;
                }
                if (baseFont == null)
                {
                    String substFontName;
                    if (fontSubstitutionMap.TryGetValue(fontName, out substFontName) && !String.IsNullOrEmpty(substFontName))
                    {
                        font = base.GetFont(substFontName, encoding, BaseFont.EMBEDDED, size, style, null);
                    }
                }
            }

            return font;
        }
    }
}
